New developments in rf-driven multicusp H- ion sources

Peters, J.
March 2006
Review of Scientific Instruments;Mar2006, Vol. 77 Issue 3, p03A528
Academic Journal
rf H- sources are in permanent use for accelerators such as HERA and the SNS. The stability and H- current of these sources depend very much on the transition region between plasma and extractor. The physics of the extraction plasma region was the subject of very detailed investigations with special sets of collars, cones, and Langmuir probe measurements. The measured changes in H- current depend on the dimensions of the inserts in the transition region. They are summarized in a graph in order to make them compar able to measurements done in Japan and USA. Recently it was possible to measure the H- distribution in a rf source both with and without extraction voltage for the first time.


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